Hydraulic system and nozzle therefor



May 8, 1934.

v`F. W... OFELDT H YJRAULIC SYSTEM AND NozzLE THEREFOR Filed Oct. 24,1930 2 Sheets-Sheet l Nm I Il l -HM w 04 .MW om L 51. mm o/ MN wN @N mmmm A/ I W. il. m L M T m lll, j NN NN mh mm, RJ. u, mm NN, M m s n, w u#l N L mm 9N May 8, '1934. F. w. `0FELDT 1,958,094

HYDRAULIC SYSTEM AND NOZZLE THEREFOR Filed oct. 24, 1930 2 sheets-snm 2atented May UNITED ,STATES PATENT oFFlca 1,958,094 Y mimmo SYSTEM ANDNozzltn` armaron v r1-oon: w. orome, Moxoesport, rs., mimorso HomesteadValve Manufacturing lO-ply of hot water under pressure. Such sources ofhot water, in combination with a suitable nozzle and connecting conduit,have been found highly useful for many operations, such as the cleaningof automobiles, trucks,- buses, streetl cars and railwaycoaches andlocomotives.

It is the purposeof the present invention to provide an improved form ofnozzle for u se in connection with the apparatus of the copendingapplications, although the invention herein described is not, of course,limited to such use. Specically, the objects of the present inventionare to provide a nozzle which shall effect a more thorough atomizationof a fluid stream, preferably a mixture of water and steam, and to in-`creaslethe velocity thereof. It is also an object of this invention toprovide means for cooling a nozzle traversed by heated iiuids so thatthe -nozzle may be handled freely without discomfort.

Another object is to provide a nozzle having aV mouth `which can bereadily turned without the necessity of shifting the body of -thenozzle. yThe invention also contemplates means for introducing acleaning compound or an emulsifying agent into a stream of uid underpressure.

3.5 According to the invention, I provide an expanding nozzle mouthhaving suitable-lateral openings therein. A water jacket surrounding thenozzle mouth and the body of the nozzle with certain of theseiopenings,

whereas the., others are open to atmosphere. A connection is made fromthe water jacket to a source of cooling water. The nozzle also includesa side connection for the introduction of a cleaning compound or anemulsifying agent into the 4 5 fluid stream ejected by the nozzle.

The results obtained by the invention are that the iiuid lstream is muchmore thoroughly atomized than has heretofore been possible and has agreater velocity. At the same time, ther body and mouth of the nozzleare maintained at low itemperature bythe cooling jacket. Theintroduction of the cleaning or emulsifying agent is simplified by theside connection. In order to facilitate proper direction ofthe uidstream in v 5.5 me' fum of the invention, I provide s swiveledconnection between the mouth ofthe nomle and the body tuhereof.

For a complete understanding of theinvention,referenceismadetotheaccompanylng drawings. in which Figures 1aand A1l together constitute a longitudinal sectional view of one form ofthe in- K ventionV showing parts in elevation;

Figure 2 is a transverse sectional view Valong the line 114-11 of Figurela; and

Figures 3a and 3b together represent a lungi-- tudinal section throughanother form of the invention.

Referring in detail to the drawings and, for the present, to Figures1u., 1b and 2, a present preferred embodiment of the invention'comprises an expanding nozzle mouth l0 and a body portion 11 connectedthereto. 'I'he nozzle mouth is a unitary casting while the body of thenozzle is built up of several members. An inner metallic conduit 12extends through thebody of the nozzle and is provided with a suitableterminal 13l for making connection with a exible hose leading to asource of hot water underpressure, such, for example, as those shown inthe copending applications above referred to. A length of hose 14 may bedisposed about the conduit 12 for providing a thermal insulationtherefor.

The hose 14 is seated on one end of a packing gland 15 composed of twocastings 16 and 17 35 provided with a threaded connection. 'I'he casting16 has an internal annular channel 18 and an integral yboss 19. -Thelatter permits a connection to be made to the interior of the body ofthe nozzle from a suitable source-of water through a hose 20. An elbow21 and union 22 complete the connection from the water source to thenozzle body. Y

A length of hose 23 extends from a sleeve 24 integral with the casting16 to a similar sleeve 25 on a tubular member 26 disposed about theother end of the conduit 12. A connector 27 is threaded into the member26 and is provided with a central opening 28 and annular passages 29.The opening 28 is enlarged at both ends and 100' threaded. At one end itreceives a portion of a ing therewith afford communication with thespace between the nozzle mouth and the tube 31. Radial holes 36 arebored in the flange 33 through the solid metal intervening between thepassages and are open to the atmosphere on the outside, and thus permitair to be drawn into the nozzle mouth. f

It will be understood from the foregoing, that when the union 13 at theend of the conduit 12 is coupled to a source of hot water underpressure, the heated fluid will flow through the conduit 12, the union30, the central opening 28 in the connector 27 and thence through thenozzle mouth 10. If the hon 20 is connected to a source of water, thewater will flow through the hose, the coupling 22, the elbow 21 and intothe annular channel 18. Thence, the water will flow through the waterjacket constituted by the hose 23 connecting the sleeves 24 and 25, intothe tubular member 26. The latter is connected to the tube 31 throughthe passages 29 in the connector 27 and the water passing through thecooling jacket therefore fiows forward into the tube 31 and thencethrough the passages 35 and the channel 34 into the stream of hot Waterissuing from the nozzle mouth 10. The movement of the fluid streamthrough the nozzle mouth 10 draws air through the radial holes 36,'andthe result is a high velocity stream of hot water mixed with bubbles ofair and steam and atomized thoroughly. {Practical tests demonstrate thatthe water entering the nozzle stream from the cooling jacket, with theair drawn through the openings in the nozzle, are influential factors inincreasing the velocity of the stream leaving the nozzle, as well as adegree of atomization thereof.

Since it may frequently be desirable to introduce a cleaning compound,such as a detergent, or an emulsifying agent, such as kerosene oil, intothe stream of hot water, I provide a connection to the conduit 12 forthis purpose. A boss 3'7 is formed in the casting 16 and is tapped toreceive a pipe 38 connected to a suitable source of cleaning compound oroil and having therein a cock 39 for controlling the ow of oil orcorn--A duced into the cold water stream, if desired,l

through a connection between the cock 39 and the elbow 21.

Referring now to Figures 3a and 3b, illustrata" ing another embodimentof the invention, a nozzle mouth 40 which is similar in all respects tothat shown, is associated with a slightly different ,form of nozzlebody. A flexible conduit 41 having the usual spiral inside 42 and arubber-fabric covering or sheath 43 is adapted to be connected by meansof a union 44 to the water heating unit. An external sheath 45 may bedisposed about the end of the conduit 41 for insulating purposes and theend of the sheath is preferably seated on a packing gland 46 comprisingthe threaded members 47 and 48. The member 47 has an ex,

' ticeably mcreases the velocity of the nozzle ternal angular channel 49tapped to receive an elbow 50 connected through a reducer 51 and acoupling 52 to a hose 53 adapted to supply lcooling water forcirculating around the outside of the conduit 41.

Another length 54 of hose serves as the outer wall of the water jacketsurrounding the conduit 41 and extends from the casting 49 to a ring 55.

A central bore 56 in the ring 55 is adapted to receive a nipple 57connected to the end of the conduit 41 through a swivel joint composedof sleeves 58 and 59 threaded together and provided with suitablepacking and a union 60. The ring is also provided with passages 6l topermit flow of cooling water therethrough.

A connector 62' having a central passage 63 and axial passages 64 isseated in the ring 55 for swiveling movement, with respect thereto. Theconnector is threaded onto the end of the nipple 57, the passage 63being enlarged and tapped for that purpose. The passage 63 is alsothreaded for receiving the end of the nozzle mouth 40 which issurrounded by a tube 65 identical with that shown at 31 in Figure la.The nozzle mouth 40 has an annular channel 66, axial passages 67 andradial holes 68 therebetween, exactly as in the nozzle mouth 10.

The foregoing description should make it clear that hot water from theheating unit passes therefrom through its connecting hose to its union44 and thence through the exible conduit 41, the union 60, the swivellednipple 57, the central passage 63 and the connector 62 and the nozzlemouth 40. Cooling fluid supplied through the hose 53 ows through thecoupling 52, the reducer 51, the elbow 50, the annular channel 49 in thecasting 47, through the hose 54 surrounding the conduit 41. The coolingwater then passes through the passages 61 in the ring 55 and thecooperating passages 64 in the connector 62. The cooling water thusreaches the interior of the tube 65 and through the axial holes 67 andthe annular channel 66 in the nozzle mouth 40, enters the stream of hotwater passing therethrough.

The operation and effect of the second form of the invention is exactlythe same as in the case of the first form. The body portion of thesecond form of the invention, however, is flexible and the nozzle mouthis swivelled thereto,- so that the utmost facility in directing thestream is obtained.

If it is desired to introduce cleaning compound or an emulsifying oilinto the stream of hot water passing through the conduit 41, this may Ybe accomplished by forming a boss 69 on the casting 47 and brazing a hub70 into the metallic portion of the wall of the conduit 41.11A pipe 71threaded to the hub and clamped to the boss 69 by a nut 72 is connectedto a suitable reservoir. Instead of supplying the cleaning compound oremulsifying agent to the body of the nozzle, as described for both formsof the invention, this material may be fed to the hot water stream atany point between the nozzle body and the water heater, or to the coldwater stream.

The aforementioned advantages and desirable results flowing from thefirst form of the invention described also characterize the second formof the invention. summarizing, the invention provides means in the formof a water jacket for maintaining the nozzle at a low temperature eventhough the latter conveys heated fluids. The flow of cooling water intothe hot water stream, as well as the drawing in of atmospheric air, no-

stream, as well as its degree of atomization. The swivelled nozzle inthe second form of the invenvention and the flexibility of the nozzlebody thereof facilitates the direction of the nozzle stream to theutmost. The side connections for cleaning compound and emulsifying oilmake possible the-easy introduction of these materials into the hotwater stream, or the cold water stream.

Although I have described but two forms of the invention which representembodiments preferred at present, the invention is not limited to thespecic details herein disclosed. Numerous changes in the constructionillustrated may be made without sacricing the advantages mentioned, ordeparting from the spirit of the invention, as set forth in the appendedclaims.

I claim:

1. In a nozzle structure, an outwardlyaring mouth, a jacket surroundinga portion of the mouth, axial holes in the nozzle mouth communicatingwith the jacket, and radial holes in the nozzle mouth communicating withatmosphere.

2. In a nozzle structure, an outwardly aring mouth, a jacket surroundinga portion of the FRANK W. OFELDT.

